rigor

Noun
  1. Something hard to endure (synset 104717403)
    "the asperity of northern winters"
    is a type of: difficultness, difficulty - the quality of being difficult
    subtypes: sternness - the quality (as of scenery) being grim and gloomy and forbidding
    same as: asperity, grimness, hardship, rigorousness, rigour, rigourousness, severeness, severity
  2. The quality of being valid and rigorous (synset 104790831)
    is a type of: believability, credibility, credibleness - the quality of being believable or trustworthy
    same as: cogency, rigour, validity
  3. Excessive sternness (synset 104647089)
    "severity of character"; "the harshness of his punishment was inhuman"; "the rigors of boot camp"
    is a type of: sternness, strictness - uncompromising resolution
    same as: hardness, harshness, inclemency, rigorousness, rigour, rigourousness, severeness, severity, stiffness

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